Re: [PATCH v3 12/15] IB/pvrdma: Add the main driver module for PVRDMA

[Yuval Shaia <yuval.shaia-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>]

On Wed, Aug 03, 2016 at 04:27:41PM -0700, Adit Ranadive wrote:
+
> +	/* Activate pvrdma device */
> +	pvrdma_write_reg(dev, PVRDMA_REG_CTL, PVRDMA_DEVICE_CTL_ACTIVATE);
> +
> +	/* Make sure the write is complete before reading status. */
> +	mb();
> +
> +	/* Check if device was successfully activated */
> +	ret = pvrdma_read_reg(dev, PVRDMA_REG_ERR);
> +	if (ret != 0) {
> +		dev_err(&pdev->dev, "failed to activate device\n");
> +		ret = -EINVAL;
> +		goto err_disable_intr;
> +	}

What if it will take the device to activate longer than the time between
write to PVRDMA_DEVICE_CTL_ACTIVATE and read from PVRDMA_REG_ERR?

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